DocumentCode :
1012724
Title :
Analysis of circular waveguide arrays on cylinders
Author :
Steyskal, Hans
Author_Institution :
Air Force Cambridge Research Laboratories
Volume :
25
Issue :
5
fYear :
1977
fDate :
9/1/1977 12:00:00 AM
Firstpage :
610
Lastpage :
616
Abstract :
An analysis is given of the mutual coupling effects in a finite array antenna of circular waveguide elements on a conducting cylinder. The array is described in terms of a scattering matrix and the multimode aperture fields of the elements are solved for by moment methods. Mutual coupling through wave propagation along the surface is treated according to GTD, since for most cases of interest the surface curvature is small in terms of wavelength. Appropriate asymptotic expansions for the magnetic field Green\´s function are derived for the two basic cases of an axial and a circumferential magnetic current element on the cylinder, the latter being a new case. The method, which allows the array elements to be nonuniformly spaced, applies to cylinders with radii > 2\\lambda and thus also includes planar arrays. Illustrative numerical examples and comparisons with infinite cylindrical and planar arrays are included.
Keywords :
Antenna array mutual coupling; Circular waveguides; Cylindrical arrays; Waveguide arrays; Antenna arrays; Antennas and propagation; Apertures; Moment methods; Mutual coupling; Planar arrays; Scattering; Surface treatment; Surface waves; Transmission line matrix methods;
fLanguage :
English
Journal_Title :
Antennas and Propagation, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-926X
Type :
jour
DOI :
10.1109/TAP.1977.1141656
Filename :
1141656
Link To Document :
بازگشت